Monroe 39139 Suspension Strut - Front Left

Monroe OESpectrum Monotube Strut for Lexus IS

Monroe OESpectrum Monotube Strut 39139 is built for drivers who want precise front-end control and a quieter ride feel on select Lexus applications. It is engineered for vehicles originally equipped with monotube shock absorbers and helps reduce noise, vibration, and harshness without changing the vehicle’s OE-style suspension layout.

Key Features

• Monotube strut design for responsive handling and consistent damping
• Filters out noise, vibration, and harshness for improved ride comfort
• Front left suspension strut application
• Mounting hardware included
• Compressed length: 15.79 in; extended length: 23.46 in; travel length: 7.67 in
• Body length: 15.29 in; body type: B9

Product Details

The Monroe OESpectrum Monotube Strut line is focused on OE-style ride control for vehicles that use monotube shock absorber architecture. Part number 39139 is a front left suspension strut for 2006-2013 Lexus IS250 and 2011-2013 Lexus IS350 applications. This part cross-references KYB 551127 and Focus Auto Parts 335836L for the same application. For Lexus IS250 and Lexus IS350 owners looking to restore front suspension response, Monroe 39139 supports controlled handling while maintaining a refined ride character.

What This Strut Helps Address

• Front-end looseness or reduced steering response
• Excessive road noise and vibration through the suspension
• Harsh ride quality from worn OE strut components
• Uneven damping performance on the front left corner
• Loss of control feel during braking, cornering, and lane changes

Installation Notes and Fitment

• Fits 2006-2013 Lexus IS250, front left; enhances performance for vehicles with stock components.
• Fits 2011-2013 Lexus IS350, front left; enhances performance for vehicles with stock components.
• Mounting hardware is included.
• Dust shield is not included.
• Compressed bumper stop and extended bumper stop are not included.
• Verify strut orientation, mounting points, and OE-style dimensions before installation.

Quality Assurance

Monroe designs the OESpectrum Monotube Strut line for controlled handling and reduced NVH in monotube-equipped vehicles. Part number 39139 is built to match the listed Lexus IS fitment and dimensional requirements for front left suspension service.